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Rational Exponents and Radicals

Rational Exponents and Radicals 1.5 - Solution

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a

When we raise a number to it's the same as taking the square root of that number.

The expression is equal to 4.

Check with a calculator

We determine the value of the expression on our calculator by writing the number then pressing and finally writing the fraction within parentheses. We finish by pressing

TI-an evaluation that displays an exponential


b

Rewrite as which is the number which multiplied by itself three times gives 27. We know that Therefore, is equal to

Check with a calculator

We can determine the value of the expression on our calculator by using the same method as in Part A.

TI-an evaluation which shows an exponential